Is the Philadelphia Orchestra slipping a few steps? “With a new performance space, and a European tour imminent under a new director, all seems rosy enough superficially. But there have recently been mutterings in the press about strife beneath the surface, including difficult contract negotiations for the players and arguments about poor acoustics at the Kimmel Centre. But then in Philadelphia, there is a sense, more than other places I’ve been, that the orchestra is a potent symbol, an ambassador of the city, and everyone you meet has an opinion about it.”